紫花苜蓿生产性能构成因子研究

Study on Factors of Production Traits in Alfalfa(Medicago sativa L.)

对3种不同秋眠类型9个不同秋眠级别的苜蓿品种进行生产性能构成因子以及构成因子间的相互关系的研究,结果表明,植株高度与节间长和再生速度达显著相关(P<0.05);生物量与植株高度和再生速度达显著相关(P<0.05);关于再生速度与植株高度、节间长和生物量的影响程度拟合方程分别如下:y1=37.165+8.17x1;y2=2.28+1.13x1;y=3.03x1。再生速度与植株高度、节间长和地上生物量有着很高的相关性。植株高度是苜蓿产量一个很好的预测指标;决定苜蓿地上生物量的最终决定因子是再生速度,所以苜蓿的再生性是苜蓿高产育种首先考虑的因子。

An experiment was conducted to exam the effects by related factors to the productivity with 3 fall dormancy, 9 category alfalfa. The result showed：There was remarkable correlation between plant height and regrowth rate, so as well as between biomass and regrowth rate. For the biomass, plant height and the length of inter-node by regrowth rate, there were 3 equations as follows ： yl = 37.165 ＋ 8.17 x 1 ; Y2 = 2.28 ＋ 1.13 xl ; Y = 3.03 x 1, By the analysis, the plant height could be a good indicator for the biomass macroscopically, but not the decisive factor. The definite factor is regrowth rate to the biomass,thus,it is the Nol trait to be chose in the alfalfa breeding for high yield.